Hy Yves
If you navigate to Settings > Booking-fields, the default bookingfield "email" uses the Joomla user profile field "email" for its "Preallocation data mapping".
Is there a way to make this field read only, as I don't want users to change this. If they ever need to change the email address, they can do this by editing their Joomla profile.
Best regards
Imre